johnhara1
Member
Registered: 19th Oct 06
Location: Newcastle upon Tyne
User status: Offline
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142mph on the clock
138mph according to the Road Angel.
That was an F20 on the limiter in 5th.
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ShEp
Member
Registered: 9th Aug 05
Location: Dingwall, Highland
User status: Offline
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Off the clock
But 139.4 according to the police car following
[Cavalier gls 16v]
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Daimo B
Member
Registered: 20th Mar 00
User status: Offline
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I wouldn't go by a road angle or anything like that.
Like police cameras, they need consistant reconfigs to maintain an accurate figure. Works on the same principles and needs re-calibrating to pickup the satalites correctly.
Speedo's arn't ALWAYS wrong though...
Standard wheels, speedo was out.
15"s on low profiles, speedo was out (by 12mph @ 114mph (126 show).
But on my 16"s my speedo seemed very accurate.
At the CvS day, it said i was doing 101mph, on my speedo it was dead on 100mph, this error seemed to carry on up a little higher as well.
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sand-eel
Member
Registered: 15th Mar 07
Location: carluke/braidwood--IRNBRULAND
User status: Offline
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with my 17" wheels the speedo seemed more accurate too, at 70mph GPS = 70mph
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sand-eel
Member
Registered: 15th Mar 07
Location: carluke/braidwood--IRNBRULAND
User status: Offline
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http://www.catherineandken.co.uk/sti/tyres.html
put your info in this..
mine can do 183mph "theoretically"
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ShEp
Member
Registered: 9th Aug 05
Location: Dingwall, Highland
User status: Offline
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It doesnt matter what people quote
Someone will come along and say NO your wrong as its not accurate
Yes by 1-3mph, but who really cares,
If thats the case then nobody in the world know what speed they are doing,
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Corsa_Sport21
Member
Registered: 13th Apr 08
Location: Leven, Fife. Drives : 205 GTi
User status: Offline
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Speedos also tend to over-read higher up the speed range.So if your doing 30mph and your clocks are reading 35mph,theyrs a good chance that when your doing 130mph on the clock,your real speed is only 120mph.
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